@Book {sfhl-nss2011,
    editor = {P. Samarati and S. Foresti and J. Hu and G. Livraga},
    booktitle = {Proc. of the 5th International Conference on Network and System Security (NSS 2011)},
    publisher = {IEEE},
    address = {Milan, Italy},
    month = {September},
    day = {6-8},
    year = {2011}
}